Shaft-governor for engines.



` R. WOLF.

SHAFT GOVERNOR FOB'BNGINBS.

APPLICATION FILED KAY 16, 1912;

Patented Sept. 10, 1912.

Figa.

UNITED sTATEs PATENT oEEioE.

RUDOLF WOLF, OF MAGDEBURG-BUCKAU, GERMANY.

SHAFT-GOVERNOR FOR ENGINES.

Specification of Letters Patent. Patented Sept, 10, 1912,

Application led May 16, 1912.

Serial No. 697,656.

.To all whom it may concern;

Be it known that I, RUDOLF WOLF, manufacturer, a citizen of the German Empire, residing at Magdeburg-Buckau, Germany, have invented certain new and useful Improvements in Shaft-Governors for Engines, of which the following is a specification.

My invention relates to improvements in shaft governors for engines, and more particularly to shaft governors which are mounted on one of the crank arms of the crank shaft, and the object of the improvements is to provide a governor of this class which has a large regulating power, and which is compact in construction, it being possible to limit its dimensions so that it shall be not much larger in diameter than the double of the outer radius of the crank arm.

With this and other objects in view my invention consists in arranging the fly balls or bodies and their cooperating springs at opposite sides of the crankarm `and with their aXes parallel thereto, and in such a Way that the fly balls or bodies move under the influence of centrifugal force in a direction parallel to the crank arm;

For the purpose of explaining the invention an example embodying the same has been shown in the accompanying drawing, in which the same letters of reference have been used in all the views to indicate corresponding parts.

In said drawing Figure 1 is a cross-section of the governor taken o-n line I-I in Fig. 2, and Fig. 2 is a side view thereof seen in direction of the arrow II partly in section. f

Referring to the example illustrated in the drawing, the operative parts of the governor are mounted within a frame or casing H in the form of ar drum which is secured to one of the crank arms B of the crank shaft D. Within the drum or casing H is a pair of spring-me1nbers, one consisting of coil springs F1, f1 and the other of coil springs F2, f2 each member having one of its ends connected to the casing, and its lopposite end to fly balls or bodies G2, G2. As shown each of the spring members consists of two sections, viz. an outer sectionF1 (and F2) and an inner section f1 (and f2),

the inner section being mounted on and secured to a collar f5 (and slidable on a stem f2 (and f2), and the outer section being connected at one end to the said collar and at the opposite end to the coperating fly body G1 (or G2). The inner ends of the inner springs f2, f2 abut against fixed collars on the inner ends of the respective rods f2 and f2 and, their rods are affixed to the casing. By thus disposing the spring sections one within the other a compact construction is obtained because the strength ening of the one spring is compensated for by shortening of the other spring. The springs F2, f1 and F2, f2 are disposed on opposite sides of the crank arm and parallel thereto. The centrifugal forces exerted on the fly bodies G1 and G2 act in radial directions, as has been indicated by the letter C, and this force acts by two components C2 and C2, the component C1 being in the direction of the springs F2, f1 and F2, f2, and the component C2 being perpendicular thereto. Totake up the component C2 the ily bodies G1 and G2 are guided on guide ways I, and I2 respectively, and in order to reduce the friction to a minimum anti-friction rollers or ball bearings K1 and K2 are interposed between the fly bodies and their guideways.

The fly bodies are provided with pivot bolts Z1, Z2 by means of which they are connected to bell crank levers W1, W2 which are pivotally mount-ed on the casing H at L1 and L2 respectively. The said bell crank levers are connected with the eccentric E by levers A2, A2 which are jointed tothe bell crank levers at P1 and P2. The circular paths of the pivots P1 and P2 are congruent with the curve described by the eccentric when being set. The rod F,1 of the eccentric E acts upon the inlet valve of the engine in a manner not shown in the drawings as these parts of the engine can be made in any known way.

In the preferred form of the governor the fly bodies G1 and G2 are so mounted relatively to the springs F1, f1 and F2 f2, that their centers of gravitation are at a slight distance away from the axes of the springs, which distance has Abeen indicated in the drawing by the letter a. Thereby the fly bodies exert a pressure on the arms W1 and W2 of the bell crank levers, which pressure is in the direction of the said arms and causes friction in the fulcrums of the bell crank levers sufficient to dampen the reacting forces.

In governors as now constructed the eccentric-rod and the valve stem operating the valve must ordinarily be connected by means of a rocker or the like. In my improved construction such members for transmitting the movements of the eccentric laterally are entirely dispensed with, because the slide or other valve (not shown) may be located within the central plane of the eccentric.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is l. In a governor for steam engines, the combination with a shaft having a crank arm, of a casing mounted on said crank arm, a pair of coil spring members each attached at one end to a relatively fixed part of the casing and disposed upon opposite sides of and parallel with the crank arm, a Hy body cooperating with each of said spring members, means adapted to guide said Hy body in a direction substantially parallel to the crank arm, and means adapted to operatively connect said Hy body with the mechanism for controlling` the engine.

2. In a governor for steam engines, the combination with a shaft having a crank arm, of a casing mounted on said crank arm, a pair of coil spring members each attached at one end to a relatively Hired part of the casing and disposed upon opposite sides of and parallel with the crank arm, a Hy body coperating wit-h each of said spring members, means adapted to guide said Hy body in a direction substantially parallel to the crank arm, and means adapted to operatively connect said Hy body withthe mechanism for controlling the engine, said guiding means embodying an anti-friction bearing.

3. In a governor for steam engines, the combination with a shaft having a crank arm, of a casing mounted on said crank arm, a pair of'coil spring members each attached at one end to a relatively fixed part of the casing and disposed upon opposite sides of and parallel with the crank arm, a Hy body coperating with each of said spring members, means adapted to guide said Hy, body in a direction substantially parallel to the crank arm, and means adapted to operativelv connect said Hy body with the mechanism for controlling the engine each of said Hy bodies having its center of gravitation at a distance away from the aXis of its .coil

`spring member, and said means for connectdisposed substantially in the direction of force caused by the location of the Hy body away from the axis of the spring.

4. In a speed governor, the combination with a casing and a Hy body, of a coiled spring member cooperating with said Hy body and constructed in two sections disposed one within the other and connected at one of their ends with each other and with the opposite ends respectively to the Hy body and to a relatively HXed part of said casing.

5. In a speed governor, the combination with a casing and a Hy body, of a coiled spring member cooperating with said Hy body and constructed in two sections disposed one within the other, a stem passing through said spring sections and secured to a relatively HXed part of said casing, and a sleeve slidably mounted on said stem, said spring sections having one of their ends connected to said sleeve and their opposite ends respectively to said stem and to the Hy body.

6. In a speed governor for engines and other purposes, the combination with a frame or casing adapted to be mounted on a crank arm, of two spring members secured at one of their ends to relatively HXed parts and respectively disposed when the governor is mounted on the crank arm at the opposite sides of and parallel to the crank arm, Hy bodies coperating with said spring members, means to guide said Hy bodies in a direction parallel to the crank arms, and means adapted to operatively connect said Hy bodies with the mechanism for controlling the engine.

7. In a speed governor for' engines and other purposes, the combination with a :trame or casing adapted to be mounted on a crank arm, of two spring members secured at one of their ends to relatively fixed parts of the casing and respectively disposed when the governor is mounted on the crank arm at the opposite sides of and parallel to the crank arm, Hy bodies coperating with said springs, means including antifriction bearings to guide said Hy bodies in a direction parallel to the crank arms, and means adapted to operatively connect said Hy bodies with the mechanism for cont-rolling the engine.

8. In a speed governor for engines and other purposes, the combination with a frame or casing adapted to be mounted on a crank arm, of two spring members secured at one of their ends to relatively HXed parts of the casing and respectively disposed when the governor is mounted on the crank arm at the opposite sides of and parallel to the crank arm, Hy bodies cooperating with said springs and located with their centers of gravitation respectively at a distance away from the aXis of said spring members, means to guide said Hy bodies in a direction parallel to the crank arms, and means adapted to operatively connect said 'ly bodies with the In testimony whereof I hereunto aiix my mechanism for controlling` the engine, said signature in presence of two witnesses. means comprisin levers res ectivel 'ointed to said Hy bodiesg and dispoged substantially RUDOLF WOLF in the direction of the forces caused by the Witnesses:

location of the fly bodies away from the axes GUSTAV KRASPER,

of the springs. OTrovoN SZCYGPAURKS.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

, Washington, I). C. 

